Two years ago, the launch of the virtual reality headset Oculus Rift was the first time consumers had access to relatively affordable virtual reality. While still not a household staple, market forecasts predict that virtual and augmented reality will be a $40 billion industry by 2020. On this edition of River to River , join Iowa Public Radio's Emily Woodbury on a tour of the Virtual Reality Applications Center (VRAC) in Ames, where the U.S. military contracts research for training soldiers, vehicles and ships are mapped out before the manufacturing process, and some virtual reality games are put to the test. She talks with VRAC director, James Oliver, as well as Stephen Gilbert, an assistant professor of Industrial and Manufacturing Systems...